Internal-combustion engine.



J. DFFRANK & A, D.'HUARD.

INTERNAL .GOMBUSTION ENGINE.

AIPLIOATION'IILEI) MAY 15, 1913- Patented July14, 1914.;

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2 I3. FRANK AND ADALOR D. HUAED, 0E ALPENA, MICHIGAN.

mrnnnancomnnsrion Enema.

To all whom it may concern Be it known that we, JULiUs D. FRANK and AoALon' D. HUARD, citizens of the United States, residing at Alpena, in the county of Alpena and State of Michigan, have invented new and useful Improvements in Internal-Combustion Engines, of which the following is a specification.

Our present invention pertains to internal combustion engines such as have water-jackets around their cylinders.

The object of the invention is to provide means calculated to relieve pressure against the wall of the cylinder or the wall of the jacket in the event of the water or other cooling agent employed freezing, and in that way preclude the possibility of the jacket wall bursting.

With the foregoing in mind the invention in all of its details willbe fully understood from the following description and claim, when the same are read in connection with the drawings, accompanying and forming part of this specificationf'in which:

Figure 1 is a verticalcrosssection showing our novel relief means asproperly applied to an internal combustion engine, some of the parts being illustrated in elevation. Fig.

2 is a horizontal section showing in plan the seat for the relief valve.

Similar numerals of reference designate corresponding parts in all of the views of the drawings.

Surrounding and spaced fromthe cylinder 1 of the engine is the outer wall 2 of'a water-jacket, and integral with and rising from the said wall 2 is a wall 3, preferably circular, having an inwardly and downwardly inclined upper edge 4, which is pref erably, though not; necessarily, ground inv order to form an etlicient valve-seat.

Stepped in a socket 5 on the :giylinder wall 1, is the lower portion of a stern 6.- The upper portion of the said stem is loosely received in a sleeve 7 on a yoke 8, the end portions of which are fixed with respect to the wall 2 in the manner illustrated, or in any other manner compatible with the purpose of our invention.

Movable vertically on the stem 6 is the relief valve 9, on which-is an upwardly extending, exteriorly threaded sleeve 10. The said valveis provided with a beveled and preferably ground surface 11, opposed to the Specification of Letters llatent.

Application filed may 15, 1913.

valve-seat 4, and on the valve is preferably,

nt July Mi, W

Serial No. 767,915.

though. not necessarily, employed a gasket 12. I

Loosely surrounding and movable vertically on the stem 6 and arranged immediately below the sleeve portion of the yoke 8, is an inverted cuplZ-B, and loosely arranged around the stem (3 and above the sleeve 9 is a cup 14-. A coiled spring 15 is seated at its,

ends in the cups 13 and 14, and surroundsthe stem 6. The said spring 15 has for its function to yieldingly hold the valve 9 to its scat under normal conditions so as to prevent the escape of water or other coolingagent from the water-jacket or space. The cup 1% is superposed on a nut 16 that is threaded on the sleeve 10 and is designed to be adjusted when it is necessary to increase or lessen the tension of the spring 15.

Under normal conditions the spring 15 will hold the valve 9 to its seat and enable the latter to effectnallyprevent the escape of water from the water-jacket or space about the cylinder wall 1. When, however, the water in the water-jacket or space tends to expand and freeze, the valve 9 will be moved away from its seat against the action of the spring 15, and because of the relief thus afforded, bursting of the wall 2 or any other part of the engine will be prevented. It will also be noted here that when the pressure in the water-jacket or space is reduced to a suiiicient extent, the spring 15 will return the valve 9 to and hold it against its seat for normal use of the engine. 7

The construction herein illustrated and described constitutes the best practical embodiment of our invention that we have as yet devised. We do not desire, however, to be understood as confining Ourselves to the specific construction and relative arrangement of parts, inasmuch as in the future practice of the invention such changes or modifications may be made as fairly fall within the scope of our appended claim.

Having described our invention, what we claim and desire to secure by Letters-Patent, is:

The combination of an engine cylinder, a water-jacket surrounding the same and having an outlet and also. having a flange and a valve seat on said flange, a yoke fixed with respect to the jacket and having an apertured upper portion, a stem disposed in said aperturcd portion of the yoke and connected with the cylinder, a reliefvalve loosely surrounding said, stem and liming a threaded set our hands in presence Of two subscribing sleeve, an inverted cup surrounding the fstelm witnesses.

and dis )osed under the upper aortion 0 t 1e yoke, a 'nut'threaded on the sleeve of the 5 valve, a cup superposed on said nut, and a spring surrounding the stem and interposed. .Witnesses:

between the two cups. W. F. DENISON,

In testimony whereof We have hereunto FRED H. Onop'l'l. 

